12. In the Fibonacci Sequence: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, ... which of these numbers are divisible by 2? 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, ... The answer is every third number, and 2 is the third Fibonacci number. How about the ones divisible by 3? 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, ... The answer is every fourth number, and 3 is the fourth Fibonacci number. Could these be just a coincidence? Examine if this pattern goes on forever.13. The golden triangle, sometimes also called the sublime triangle, is an isosceles triangle such that the ratio of the hypotenuse a to base b is equal to the golden ratio, a/b = o. What is the measure of the vertex angle of the triangle